NIKE SWIM Poly Color Surge Jammer The Nike Men's Poly Color Surge Jammer with the durable Nike Performance Poly fabric offers a streamlined fit with excellent shape retention for long lasting wearability. MORE BENEFITS Stretch waist with interior draw cord for a snug, adjustable fit Front lining for enhanced comfort Engineered with Nike Performance Poly, a durable long-lasting performance polyester Excellent shape retention Fabric 100% polyester (53% polyester / 47% pbt)